Metal window frame



A. F. FROMHOLD METAL WINDOW FRAME Filed Jan. 2, 1923 June 16, 1925.

Patented June 16, 1925` AUNITED STATES` PATENT OFFICE.

ALXANDER F. FROMHOLD, 0F NEW YORK, N. Y., ASSIGNOB T0 S. E. POMEROY COM- lPA'NY, INC., 0F NEW YORK, Y., A. GOLRLPORATION 0F NEW YORK.

, METAL WINDOW FRAME.

Application led January To all whom t may cof/wem: I

Beit known that I, ALEXANDER I". ,FROM- 2, 1923. Serial 110. 610,101.

the corresponding sash e. lt is then bent inwardly. at an acute angle, as at as, is again Hom, a citizen of the United States, and' a bent at an acute angle into arallelism with resident of lthe borough of Manhattan, of the cit of New York, in the State of New York,- avenlinvente'd certain new and'useful Improvements in Metal Window Frames of which the following is a specification, re erence being had to the' accompanying draw ing, forming a part hereof.

This invention is concerned particularly with the construction of the hollow metal jambs or vertical side members of a window frame, between which the sashes slide. It has for its objects to reduce the cost of construction, to avoid the necessity of employ-` ing a eat number of screws or bolts to secure t e parts together .without sacrificing rigidity and tightness, and to makethe window more certainly weatherproof. The invention will be more fully explained hereinafter with reference to the accompanying drawing in which it is illustrated as embodied in a suitable structure and in Which- Figure 1 is a view in elevation, partly in vertical section, of a portion of a window frame which'embodies the -invention, a por:s tion of one of the sashes being also shown.

Figure 2 is a View in horizontal section on the plane indicated by the line 2'-2 of Figure l. v

Figure 3 is a view in `elevation as seen from the right hand in Figure 1, partly broken out. i

Each Ahollow jamb or vertical side member, whichl also constitutes the weight box, comprises a pulley-stile a and the main body of the jamb, which may be formed of two parts?) and c, united by a -folded seam, as at d. The parts b and c of the jamb are suitably formed to tit the masonry of the windovsr opening, and the face portion b', c of each, atV right angles to the planes of the window sashes e, wis bent inward atan acute angle, as at b2, c, is then bent at an acute angle into a plane parallel` with the face, as at b, c3, and is then bent into a curve as at b,\c4,' slightly more than a quarterdound. Thepulley-stile a has a llat face a of a width which corresponds to the difference between the planes of the upper and lower sasbes, approaching closely enough, at the angles a2, to the angles b5 and o formed by the parts b', b2 and c', c2, to afford a fairly snug sliding lit for the projecting web e of the face, as at m4,'and is then ent in to a halfn round, as, at w tobear 'against the extended quarter-rounds b* and o* above kmentioi'ied 'and to form a bearing or line of sliding con- 'tact for the web e of the corresponding sash.

Heavy metal braces f, distributed at suitable' intervals in the height of the jamb, and arranged to bear against the curved portions 2'24. and c* above mentioned, are engaged by screws g, which are passed through -the face a of the pulley-stile, between the planes of the sashes, into the central portions f of the braces, which central ,portions stand between the angles of the parts a3 and prevent the .collapsing of the central portion of the jamb or the pulley-stile. The braces are further extended and bent, as at f2, parallel with the sides b2 and c2 and again, as at f3, parallel with thefaces b and c of the jamb, and the ends of the braces preferably bearing against the front and rear walls of the j amb. The braces thus support and stiften and prevent the collapsing of the -jamb and thus prevent the use of a relatively light gauge of metal in the con struction of the j amb Witlioi'it sa-crici'ng the desired stiiness and rigidity. It will be observed that when the screws g are set up, since thi -races bear against the free overlapping. portions of. the .main members of the -axnb'and of the pulley-stile and at theirm vdle points are spaced from the face of the pulley-stile, they draw the braces f tightly against the curved portions b* and c* and these curved portions against the curved portions as of the pulley-stile,

thereby insuring a tight closure of the joint which is formed at these points and so preventing the access of moisture to the inside of th'e weight box. Furthermore, the curved portions a are drawn toward the sashes so that a' close sliding fit between the 'webs of the sashes and the curved portions a. is as- 1. A metal window jamb having-al main jamb member bent inward from its face with a curved portion at its edge, a pulleystile also bent inward from its face with a curved portion at its edge overlapped by vthe curved portion of the main jamb member andlinterlocking 'therewith and forming a guide groove for the sash, and means to c secure the parts together.

2. A `metal window jamb having a'main jamb m'ember bent inward from its face with a curvedportion at its edge, a pulleystile also bent inward from its face with a curved portion at its edge overlapped by the curved portion of the main jamb member and interlocking therewith and forming a guide groove for the sash, a heavy metal brace bearing against the overlapping portions7 and a screw passed through the pulleystile into the brace to` secure the parts together.

.3. A metal window jamb having a main jamb member bent inward from its face at an acute angle and bent at an opposite acute angle with a curved portion-at its edge, a pulley-stile also bent inward from its face at an acute angle, and again at an acute angle with a curved portion at its edge overlapped by the curved portion of the main jamb member and interlocking therewith and forming a guide groove forthe sash, and means to secure the parts together.

` This specification signed this 29th day of December A. D. 1922.

- ALEXANDER F. FROMHOLD. 

